I've been using this for a while. Quality is great and it does feel very 'integrated' rather than a round-a-bout way to view the Crunchyroll website.

The only issue standing in its way for widespread use is that it's very difficult to find episodes. When selecting an episode, the "forward" button will only scroll forward 20 episodes at a time. Each 'scroll' takes about 10 seconds. You can imagine that when watching an anime like Naruto or Gintama with several hundred episodes, it takes 2 - 3 minutes just to get to the latest episode.

Hitting the 'backwards' button does not go to the latest episode either. You can watch the very latest episode by adding a eries to your Crunchyroll queue, but that still won't allow you to watch the second latest episode by going back or anything. You have to start from episode 1 and hit 'forward' for ages.